Just a short excerpt from The Psychology of Religious Knowing by Fraser Watts and Mark Williams:

“The contrast is between insight that is merely intellectual or neutral and a second type of insight that has been variously described as true, effective, dynamic or emotional. … Religious insight that, like therapeutic insight, has been chiseled out of experience will have more personal consequences than merely intellectual or ‘notional’ religious insight. Emotional and behavioural reactions are more likely to be congruent with beliefs that have been formed in this way.” (p. 71, 74)